Calculate the annual sum of the c taken up and stored

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Reference no: EM133613402

Problem

Forests are important to the global carbon cycle, taking up a substantial amount of CO2 from the atmosphere via photosynthesis. The production of forests is often limited by the supply of N, and thus greater C uptake may occur with elevated N deposition.

A. How much additional C has been taken up and stored as wood if N deposition has added an average of 15 kg N per hectare per year to temperate deciduous forests for 20 years? Assume that 10% of the N deposition has been taken up and used for increased plant growth, that the C:N ratio in wood is 500:1, and that the temperate deciduous biome makes up 13 million km2 (1 hectare [ha] = 0.01 km2).

B. Make the same calculation for the boreal forest biome, with a N deposition rate of 5 kg N per hectare per year for 20 years, the same N uptake amount and C:N ratio of the wood, and an areal coverage of 19 million km2 for this biome.

C. Calculate the annual sum of the C taken up and stored as wood from your answers to question A and B, and compare that to the amount of anthropogenic C emitted in figure 25.3.

Reference no: EM133613402

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